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Pfizer's CEO announced that a booster dose of their COVID-19 vaccine might be needed within a year of full vaccination, with annual revaccination likely. Variants play a crucial role in this decision. The vaccine remains effective six months after the second dose. A survey shows 21% of American adults are unwilling to get vaccinated, a slight decrease from earlier surveys. Some prefer to wait and see how others respond to the vaccine. The report concludes with acknowledgments to Kaiser Health News and a look at health headlines.

According to Pfizer, how soon after full vaccination might a booster dose be needed?

• Within 3 months

• After two years

• Within 6 months

• Within a year

What role do variants play in the COVID-19 vaccination process according to Pfizer?

• Variants are crucial in determining booster needs

• Variants are irrelevant after the first dose

• Variants only affect unvaccinated individuals

• Variants have no impact

How effective did Pfizer report its vaccine to be six months after the second dose?

• Highly effective

• Moderately effective

• Ineffective

• Not effective

What percentage of American adults, according to the survey, are hesitant to get the COVID-19 vaccine immediately?

• 5%

• 50%

• 25%

• 12%

What was the percentage drop in adults who said they would never get a vaccine from previous surveys?

• 3 points

• 4 points

• 1 point

• 2 points